What are the four families of printing?

Printing processes group into four families by how the image area carries ink. Relief (letterpress, flexography) inks a raised surface. Intaglio (gravure, engraving) holds ink in recessed cells below the surface. Planographic (offset lithography) prints from a flat plate where image and non-image areas are separated chemically. Stencil (screen printing) pushes ink through open areas of a mesh. Each lays a different ink film and suits different jobs.

Why does screen printing lay such thick ink?

Screen printing squeegees ink through an open mesh directly onto the substrate, so the ink film can be 10 to 100 micrometers thick - far more than offset lithography's roughly 1 micrometer. That thick, opaque layer is why screen-printed colors look so saturated and can sit brightly on dark fabrics, but it also means fine detail is limited.

Why does gravure give such rich, continuous-looking tone?

Gravure is an intaglio process: the image is a grid of tiny recessed cells, and deeper or larger cells hold more ink. Because the amount of ink varies almost continuously with cell depth, gravure can lay near-continuous tone without the coarse halftone dots that relief and offset rely on. That is why gravure is favored for long-run magazines and packaging with smooth, rich color.

The Families of Printing: Relief, Intaglio, Planographic, and Screen - How Each Lays Down Color

Apart from plateless digital printing, every printed color you have ever seen was put there by one of four basic methods. Ink can sit on a raised surface and stamp down (relief). It can hide in recessed grooves and get pulled out onto the page (intaglio). It can rest on a perfectly flat plate that keeps ink and blank areas apart by chemistry alone (planographic). Or it can be squeezed straight through a stencil mesh (screen). These four families explain why a magazine, a banknote, a cereal box, and a concert poster look and feel so different - even in the same color. Let's take each apart.

Print · 109 4 Live Demos ~3 min read Printing processes

By Chirag Bansal

4 families

How every press lays ink

~1 µm

Offset's thin ink film

10-100 µm

Screen printing's thick ink

~1440

Gutenberg's relief press

Four ways to put ink on paper

There are countless printing machines, but they answer one question in only four ways: where on the plate does the ink live before it jumps to the paper? That single choice - raised, recessed, flat, or through a stencil - defines a family, and each family has its own physics, economics, and characteristic look.

Relief - ink sits on the raised parts (letterpress, flexography, the woodblock, the humble rubber stamp).
Intaglio - ink hides in recessed cells or lines below the surface (gravure, engraving, etched banknotes).
Planographic - image and blank areas are on the same flat plane, kept apart by grease-and-water chemistry (offset lithography, the workhorse of commercial print).
Stencil - ink is pushed through open areas of a mesh (screen printing, stencils, the risograph's cousin).

The core idea: the four families differ in where the ink starts on the plate, and that governs how much ink reaches the page, how tone is built, what substrates are possible, and how the color looks and feels. Learn the four and you can read almost any printed piece.

The families, in cross-section

The clearest way to see the difference is to slice the plate in half. Switch between the four families and watch where the ink sits, and how it transfers to the paper below.

Interactive 01 · Plate cross-section

Where the ink lives

A side view of each family's plate (top) and the printed result (bottom). Relief inks the peaks; intaglio fills the valleys and wipes the top clean; planographic keeps a flat plate where only the greasy image area holds ink; stencil pushes ink through the open mesh. Same image, four very different mechanisms.

Family

Ink film and color richness

Each family lays down a very different thickness of ink, and thickness is color. More ink on the page means more colorant in the light's path, so - following the same D = k · thickness law behind densitometry - the color gets denser and more saturated. Offset's whisper-thin film is why it leans on tiny halftone dots; screen printing's thick slab is why its colors punch. Drag the film thickness.

Interactive 02 · Ink film thickness

Thicker ink, richer color

A single ink laid at different film thicknesses. Optical density rises with thickness (D = k · t), and reflectance falls as R = 10^(-D), so the swatch deepens toward full saturation. The markers show where each family typically sits - from offset's ~1 µm to screen printing's tens of microns.

Ink film thickness 1.0 µm

How each family makes tone

Ink is either down or it isn't - so how does a press print a smooth gray or a soft gradient? Each family answers differently. Relief and offset break tone into halftone dots that grow and shrink. Gravure, an intaglio process, varies the depth of each cell, laying more or less ink for near-continuous tone. Screen printing uses a coarse halftone limited by its mesh. Compare a gradient rendered three ways.

Interactive 03 · Building tone

Dots, depth, and mesh

The same 0-to-100% gradient, rendered the way each family builds tone. Offset halftone grows circular dots on a fine grid; gravure varies ink per cell for smooth, near-continuous tone; screen printing uses a coarse dot limited by mesh. Zoom in with the cell-size slider to see the structure.

Method

Cell size 12 px

Choosing a process

No family is best - each wins a different job. Gravure's costly cylinders pay off only over millions of impressions; digital shines for a run of ten; screen prints on anything from glass to cotton. Pick what your job needs and see which family the trade-offs point to.

Interactive 04 · The process chooser

Which family fits the job?

Set what the job needs and the chooser scores each family on fit. It is a teaching heuristic, not a print quote - but it captures the real trade-offs of run length, detail, substrate, and ink body that push work toward one family or another.

Run length medium

Detail needed high

Substrate

Ink body / opacity normal

The families, defined

The members of each family, and how to spot them.

Relief · letterpress

Ink on the raised surface, pressed down. Sharp type with a slight debossed "bite" you can feel. The oldest mechanical family, from Gutenberg on.

Relief · flexography

A modern relief process with soft rubber/photopolymer plates - the workhorse for plastic packaging, labels, and cartons.

Intaglio · gravure

Ink in engraved cells on a cylinder, wiped clean on top. Rich, near-continuous tone for huge-run magazines and packaging.

Intaglio · engraving

Ink in fine etched lines, printed with pressure that leaves a raised, tactile line - the security look of banknotes and stamps.

Planographic · offset litho

Flat plate; greasy image holds ink, damp blank areas repel it. Ink offsets to a rubber blanket, then paper. The commercial workhorse.

Stencil · screen

Ink squeegeed through open mesh. A thick, opaque film that prints on almost any surface - posters, shirts, glass, circuit boards.

What it means for color

Ink film sets saturation

Thick-film families (gravure, screen) reach dense, punchy color in one pass; thin-film offset builds color with halftone area instead.

Tone method sets smoothness

Gravure's variable cell depth gives near-continuous tone; halftone families show dot structure under a loupe.

Substrate widens or limits

Screen and flexo print on non-paper surfaces offset can't touch, which changes the achievable gamut and finish.

Registration still rules

Any multi-color family must align its separations; misregistration shows as color fringing regardless of process.

Economics pick the family

Cylinder cost vs setup vs per-click cost decides whether gravure, offset, or digital is even affordable for a run.

The feel is a clue

Letterpress bite, engraved relief lines, screen's raised ink - touch often reveals the family before your eyes do.

"Hold a banknote, a magazine, a cereal box, and a band tee to the light. Four colors, four feels, four families - relief, intaglio, planographic, and stencil - each solving the same little problem in its own stubborn way: how to get exactly this much of exactly this ink to land exactly here." Editorial summary · the same problem, four answers

The takeaway: printing sorts into four families by where the ink starts on the plate - raised (relief), recessed (intaglio), flat (planographic), or through a mesh (stencil). That choice drives ink film thickness, how tone is built, which substrates are possible, and the final color's density and feel. Knowing the four lets you read - and specify - almost any printed piece.

Test your understanding

Six questions on the four families, ink film, tone building, and choosing a process. Instant feedback, no scores recorded - a wrong answer comes with a short explanation.

Quick check

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Question 1 of 6

Continue your journey

The families connect to the four-color process, halftone dots, screen printing, digital output, and the substrates they all land on - here's where to go next.

Print · 23

The Families of Printing: Relief, Intaglio, Planographic, and Screen - How Each Lays Down Color

Four ways to put ink on paper

The families, in cross-section

Where the ink lives

Ink film and color richness

Thicker ink, richer color

How each family makes tone

Dots, depth, and mesh

Choosing a process

Which family fits the job?

The families, defined

What it means for color

Test your understanding

Quick check

Continue your journey

CMYK and the Four-Color Printing Process

Halftones and Screening: How Print Turns Color into Dots

Screen Printing: How Posters and T-Shirts Get Their Color

Digital Printing: Inkjet, Toner, and How They Differ from Offset

Substrates and Finishing

Dot Gain and Tone Reproduction on Press